Compare and order angles
Learning focus
Learn to compare angles and identify acute, obtuse and right angles.
This includes:
- one learning summary
- two quizzes
Learn
An angle measures the size of a turn.
A right angle is 90° or a quarter turn
An acute angle is less than or < 90°
An obtuse angle is greater than or > 90°
Can you identify which of these is the smallest and largest angle?
Angle a is the smallest angle and is less than a right angle.
Angle c is the smallest image but is in fact the largest turn. It is the obtuse angle, so it's greater than a right angle.
Can you identify which of the below angles are acute, right angle or obtuse?
- Angle a is 70° so it is acute.
- Angles b and c are both right angles.
- Angles d and e are obtuse as they are 120° and 150°.
- Angle f is acute as it is 25°, so less than 90°.
Practise
Activity 1
Practise comparing angles with this quiz.
Activity 2
These questions will help build your confidence in identifying and comparing angles.
Read each question carefully. How is the question asking you to sort the angles?
Play
Play Guardians: Defenders of Mathematica to learn more and sharpen your skills on this topic.
